Skip to main content

Full text of "Arduino"

See other formats



build, hack, tweak, share, discover.- 


Written By: RobotGrrl 


Awl (1) 

(Or something sharp to poke holes through popsicle sticks) 

Hot Glue gun & hot glued) 

Soldering/desoldering tools (1) 


RoboBrrd's Characteristics 

A RoboBrrd is a robot that experiments with human-robot interaction and is created from a 
limited selection of materials. Inspired by birds, RoboBrrd has a beak and wings that allow it 
to produce actions based on sensory inputs. The combination of multiple actions create 
behaviours for RoboBrrd to exhibit. These behaviours provide a way for fun and guirky 
interactions to occur between the robot and human. It is within the interaction where the 
robot shows its character. 

There are numerous aspects, an example being character, that draw humans toward a robot. 
In the robotics research world, the study of these aspects in robots is under the umbrella of 
social robotics. Social robotics explores concepts of how robots and humans can interact 
and understand each other on a more natural basis. 

We attempt to introduce three of these concepts with RoboBrrd: 

First, the appearance and initial understanding of expectations for the robot. RoboBrrd's bio-inspired design allows us to 
anthropomorphize a familiar species. Humans will be able to recognize the key features, and create base expectations 

© Make Projects 

Page 1 of 28 


of what the robot may do. Second, the robot communicating certain meaningful messages with behaviours to humans 
through its own movement/output. RoboBrrd allows us to use the degrees of freedom from the beak, wings, and stand 
to express different behaviours. The LED eyes serve as an indication for the current state of the robot, and can be 
adapted to illustrate its current mood based on its needs. Third, the robot understanding messages from the human. 
RoboBrrd will have a motion sensor, some tilt sensors, as well as two light dependent resistors (LDRs). These will allow 
it to interpret what is happening in its surrounding environment, and do some action based on the interpretations. 

Building a robot also uses technical and mechanical aspects. Here are some details that we 
will learn about: 

Designing a robot from a limited variety of materialsCreating a mechanism to move a beak (converting rotation into 
somewhat of a linear translation)LM317 voltage regulator circuitTLC5940 PWM shift out circuitProgramming 
servosProgramming sensorsProgramming behaviours 

Building a RoboBrrd can be challenging. The first step will help you determine how complex 
your RoboBrrd will be, and parts you will need. 

Here are some video resources that may also help you: 

RoboBrrd TeaserRoboBrrd CharacterRoboBrrd Design RoboBrrd ElectronicsRoboBrrd BeakRoboBrrd Light ChasingRobot 
Mesh Network - RoboBrrd and MANOIRobot Mesh Network - RoboBrrd and MANOI AGAIN! 

Here are photo resources: 

Flickr: RoboBrrd Documentation ImagesFlickr: RoboBrrd Collection 

Here are code resources: 

Github: RoboBrrdMainGithub: RoboBrrdCommGithub: MeshRobots 

© Make Projects Page 2 of 28 


Step 1 — Plan what you're going to build 




4J JB- 

^ 4^jf>^ 




■^ r - 


• How complex do you want your 
RoboBrrd to be? What do you want 
your RoboBrrd to be able to do? 
Here are some images of sample 

• Be sure to check what parts you 
already have, and what parts you 
will need. This will help you in 
deciding which configuration you 
want to build. 

• If this is one of your first robots, 
going for a smaller configuration 
may be better, and you can add on 
more to the RoboBrrd as you go 

Step 2 — Create the front panel of RoboBrrd 


&* A 



* i 

The front panel is the main focal point of this robot. This is where the beak is placed, and 
the eyes. We will need four pencils and some popsicle and coffee stir sticks for this step. 

Cut off the eraser tops from the pencils (1) and create a square (2). We may want to save 
the eraser tops for later. 

Attach popsicle sticks to the pencils (3). Make sure that they are as perpendicular as 
possible when applicable. 

© Make Projects 

Page 3 of 28 


Step 3 — Create and mount the beak on RoboBrrd 

,; ■ ,■.-.-.-■■■. <ri 

-lW*#»>«r t'dtt* 

The beak of the RoboBrrd is one of the most difficult parts of the robot. We have to take 
the patience to make this piece as best as we can! We will have to check that the beak fits 
into the opening that we created in RoboBrrd's front panel. We will also have to make sure 
that the two halves of the beak will be slightly touching each other at the back edge of the 
beak halves. 

We will need popsicle and coffee stir sticks for this step, as well as a sharp "poking" tool. 

There are two parts to the beak as a whole, the top half and the bottom half. The steps 
below will be for the top half. To create the bottom half, assemble another top half and turn 
it upside down. 

Start by creating a base triangle (4). 

Cut a popsicle stick and poke a hole into it at the end of the straight edge (5). Make sure 
that the wood doesn't split. If it does, grab another popsicle stick and try again. 

Attach the poked popsicle stick to the middle of one of the sides of the triangle (6). Add 
coffee stir sticks from the two adjacent edges of the triangle to the poked popsicle stick 
(7). Add two coffee stir sticks leading to the tip of the beak (8). 

Cut a coffee stir stick the length of the space between the two popsicle sticks on the front 
panel (9). Attach a small coffee stir stick piece (one to each side) connecting the poked 
popsicle stick and the diagonal beak coffee sticks (10). 

© Make Projects 

Page 4 of 28 


Step 4 — Create and mount the beak on RoboBrrd continued 

• Create the bottom half of the 
beak by repeating the steps 


• Place the coffee stir stick that was 
cut in the second-previous step 
through the hole in the beak (11). 
Check that the beak (with both 
halves) measures up to everything 
in the front panel. Glue the coffee 
stir stick to the two popsicle sticks 
on the front panel (12). 

• Once glued, add two small coffee 
stir stick pieces to each side of the 
beak on the coffee stir stick (13). 
This will help keep the beak in the 
middle as it is rotating. 

• Repeat the mounting steps 
for the bottom half of the 
beak if not done already. 

• Grab two popsicle sticks and poke 
holes at each of the ends in them 
(14). Attach them to the holes in 
the "poked hole piece" in the beak 
halves by using some wire (15). 

► Take a break, you just completed 
one of the most challenging parts 
of the RoboBrrd construction! 


© Make Projects 

Page 5 of 28 


Step 5 — Add the other sides 

fmn umm &Si 

We will need more pencils, many coffee stir sticks, and some wire or string. 

Create two squares of pencils (16). 

Create a mesh of coffee stir sticks on one of the squares (17). This will be used for the 
base of the RoboBrrd, where all the servos are mounted and all the electronics sit. 

Attach the front panel to the bottom panel (18). Be sure to check that they are attached at 
90 degrees as much as possible. 

Attach the other square on the back panel on the opposite side of the front panel (19). Try 
to keep this attached at 90 degrees as much as possible too. 

Attach two pencils to the top of the two standing panels (20). 

Add some popsicle sticks in for some support (21). 

© Make Projects 

Page 6 of 28 


Step 6 — Test the electronics 

We are going to take a break from the construction aspect for now, and play with some of 
our electronics. Testing the electronics that we are going to be using is important, as there 
is not much room inside of RoboBrrd once all of the electronics are there. We will need all 
of the electronics that we are planning to use in RoboBrrd. 

Test all of the servos and ensure that they are able to be controlled. You can use the 
"Sweep" example in the Servo library for Arduino. We are going to create a separate power 
supply to the servos in a later step, we are seeing if they are able to move in this step. 

Test all of the LEDs to ensure that they can light up. You can use the "Fade" example in 

If you are going to have any sensors in RoboBrrd, be sure to check them as well. You can 
use the "AnaloglnOutSerial" example in Arduino. 

© Make Projects 

Page 7 of 28 


Step 7 — Create and mount the eyes 

cf r S 

©e® ^p-x^ 




The eyes for RoboBrrd will seem magical because they look white, but with some LEDs we 
can turn them to any colour we want! We will need two ping pong balls. 

Poke a hole in the ping pong balls for the LED to fit into (22). 

With the LEDs fit into the ping pong balls, mount them on the front panel of RoboBrrd (23). 
We should be able to take the LEDs out without any problems. Draw eyes on the ping pong 
balls (24)! 

Attach long wires to the LEDs (so they can reach the back of RoboBrrd without being 
tight), shrink wrap each of the leads, and glue in to the ping pong ball (25). 

© Make Projects 

Page 8 of 28 


Step 8 — Create & attach the wing servo mounts 

The wing servo mounts are what hold RoboBrrd's wing servos in place. They are similar to 
the mouth servo mount, but are a bit shorter. We will be making two of these, for the left 
and right wings. You'll want to duplicate each of the steps, or when finished go back and 
construct the remaining side. We will need some coffee stir sticks and popsicle sticks. 

Check the boundaries of each servo, and ensure that the most degrees of movement will 
be the side that the wing will be on, and attach the servo horn. 

Glue two short coffee sticks (that are a little longer than the servo width) onto the servo 
mounting tags (26). 

Attach the two short coffee sticks onto popsicle sticks (27). Place the popsicle sticks 
inside RoboBrrd and see how short they need to be for the wings. The wings should be 
situated below the beak. Cut to the necessary length. 

Cut an additional two popsicle sticks to the same length as the previous step. 

Cut two popsicle sticks that are a little bigger than the width of the servo + coffee sticks + 
popsicle sticks construction. Attach these to the pairs of popsicle sticks as a base (28). 

Determine how far apart you want these two bases to be. They should be a little longer 
than the depth of the servo. Cut and glue two popsicle sticks attaching the bases together 

© Make Projects 

Page 9 of 28 


Step 9 — Create & attach the wing servo mounts continued 


• Glue two popsicle sticks attaching 
the tops of the bases together (30). 

• Test out the stability of the mount 
by moving the servo and applying 
pressure to the sides of the mount. 
Use your intuition if you want to fix 
it more to make it more stable. 

• This is a good time to 
construct the remaining 
side, if you have not already. 

• Now that we have the two servo 
mounts complete, we need to 
mount them inside of RoboBrrd. 
They should be relatively close to 
the front panel, but not too close if 
they will be moving against 
something. When you find the 
appropriate place, glue the base in! 

© Make Projects 

Page 10 of 28 


Step 10 — Create & attach the mouth servo mount 

The mouth is the most challenging aspect of RoboBrrd, these steps will be testing your 
patience. Take a break if you have been at RoboBrrd for a while. Now, we will be creating 
a mount similar to the wing servos, the steps are similar. We will need popsicle and coffee 
stir sticks. 

Check the boundaries of the servo. The most movement should be near the beak. 

Follow the same steps as previous to create the same type of servo mount for the 


mouth servo. 

Determine where the servo mount will be placed inside of RoboBrrd. It should not be too 
far away from the beak. Mark where it will be placed with a pencil on the coffee sticks on 
the base of RoboBrrd. 

Grab a popsicle stick and poke a hole in the rounded end. Compare the length of the servo 
arm to the popsicle stick. The popsicle stick should be long enough to completely open the 
beak when the servo is horizontal (32 (accidentally skipped 31, oops!)). We will refer to 
this as the servo arm popsicle stick. 

If the mouth popsicle sticks cannot reach the servo arm popsicle stick, you may have to 
extend the mouth popsicle sticks. This can be done by gluing another popsicle stick on 
them. You will have to poke holes in the ends of the sticks. 

When the proper length is found for the servo arm popsicle stick, cut the popsicle stick. 

© Make Projects 

Page 11 of 28 


Step 11 — Create & attach the mouth servo mount continued 

• Attach the mouth popsicle arms to 
the servo arm popsicle stick with a 
piece of wire. 

• Glue the servo arm popsicle stick 
to the actual plastic servo arm. 

• Test to make sure that the servo 
can move without any forcing to the 
necessary points: overbite, mouth 
open, underbite (33). If you do have 
to force the servo to move, check 
to make sure that the popsicle 
sticks from the mouth are long 
enough. Also check to make sure 
the servo arm popsicle stick is long 

• Keep adjusting and testing the 
mouth until it works. You will need 
patience, but the reward of the 
mouth working smoothly will be 
worth it. 

• Using the markings of where the 
servo mount will be placed, glue it 
in. It is hard to fix this step, so 
make sure to triple check that 
everything is able to work at that 

Congrats! You have mounted the 
mouth servo! :) 

© Make Projects 

Page 12 of 28 


Step 12 — Prepare electronics 

© Make Projects Page 13 of 28 


• Preparing the electronics will 
depend on what electronics you 
have for RoboBrrd for your specific 
configuration. These steps are 
mainly a check list to make sure 
you have everything that you need 
for the next steps. 

• Arduinos and Proto Screw Shields: 
Make sure your Arduinos work. If 
you are using a Proto Screw 
Shield, which is highly 
recommended for sanity purposes, 
you can assemble it with a tutorial 

• Voltage regulator circuit: You will 
need a LM317, 240 ohm resistor, 
5k ohm trimpot, a battery for 
external power for the servos, a 
10uF capacitor, wires, heat-sink 
and a screw and nut. This will be 
necessary for the configurations 
that use more than one servo, as 
the servos draw more current than 
the Arduino can provide. 

• LED PWM Eyes: If you won't be 
controlling the LED eyes with an 
Arduino, you will need to use a 
PWM shift out chip to help. You will 
need a TLC5940, a DIP socket for 
it, a 2k and 10k ohm resistor, and 
wires. There are some additional 
resources here: 

• Servo plugs: You will need male 
headers for the servo plugs. The 
number you will need is the number 

© Make Projects 

Page 14 of 28 


of servos in your RoboBrrd 
configuration, multiplied by 3 (for 
signal, voltage, and ground). 

• Wires: We will need lots of wires 
for RoboBrrd, best type will be 
solid core, 21 gauge, different 
colours (red, black/brown, orange, 
purple, etc). 

© Make Projects Page 15 of 28 


Step 13 — LM317 Voltage Regulator & Servo plugs 

• We can't use the Arduino to power 
all of our servos because the 
Arduino does not provide us with 
enough current. The LM31 7 voltage 
regulator is used to provide 
regulated power from an external 
battery to our servos. As @infurl 
suggests, there is also a 7805 chip 
that outputs 5V. If you are handy 
with circuits, you may want to 
check out the 7805! 

Before proceeding, check what 
voltage the servos support. In the 
following steps, we will be using 5V 
as the operating voltage for our 

• We may want to use a female 
header to insert the LM317. Doing 
so will make the LM317 easier to 
replace if it breaks. 

• If you have spare parts, it might be 
useful to create the circuit on a 
breadboard first. 

• The LM317 works by us supplying 
a voltage in, some adjustment 
resistor magic, and finally sending 
the adjusted voltage out (33). 

• The LM31 7 datasheet has an 
example circuit: 
We will add in a 10uF capacitor 

after Vout to smooth the servo 

© Make Projects 

Page 16 of 28 


Step 14 — LM317 Voltage Regulator & Servo plugs continued 

• Here is our circuit diagram: (34) 

• Some things to look out for when 
soldering this circuit: 

• Make sure you keep track of 
where Adj and Vin are when you 
are flipping the chip around 

• The trimpot has three leads from 
it. Use two of the closest leads 
to obtain the trimmed resistance. 

• The capacitor has the voltage 
out attaching to the positive 
side, and to get the smoothed 
voltage, you attach a wire also 
to the positive side. The 
negative side goes to ground. 

• Once the circuit is complete, we 
need to test it. 

• Connect the battery to the circuit. If 
we see smoke, or if the LM317 
becomes hot, disconnect the 
battery. There is something wrong 
with the circuit. Go through all of 
the steps and follow the circuit 
diagram to find the bug. 

© Make Projects 

Page 17 of 28 


Step 15 — LM317 Voltage Regulator & Servo plugs continued 

• Attach a multimeter (on voltage 
mode) to the smoothed voltage out, 
and to ground. As we turn the 
trimpot, we should see the voltage 

• Turn the voltage to 5V, or as close 
as you can get it. For the servos, it 
is best to be under voltage than 
over voltage. 

• For the servo plugs, cut three 
pieces of male headers for the 
number of servos that you need. It 
is easier to solder when the 
headers are longer, because they 
don't have a tendency to be on an 

• Solder the left side of the headers 
to their respective pin on the 
Arduino. It is best to not use the 
interrupt or UART pins in case they 
are needed. 

• Solder the middle pins all together, 
they are used for the voltage. Also 
solder a connection from the 
voltage out capacitor to the middle 

• Solder the right pins all together, 
they are used for the ground. Also 
solder a connection from the 
ground on the proto screw shield to 
the pins. 

• Test the voltage from the servo 
pins to make sure there are no 
accidental shorts or reversals. 

© Make Projects 

Page 18 of 28 


Step 16 — TLC5940 PWM Shift Out 

r?~ v vi 


r::UH!r||Ui«s:r.s«l I 

The TLC5940 PWM Shift out is used for RoboBrrd's eye LEDs if they aren't being 
controlled by the Arduino MEGA. This IC gives you a whopping 4096 levels of PWM, per 
channel. They can also be daisy chained for more channels. Just as a warning, with my 
RoboBrrd I had troubles with the Servo and TLC5940 library being used at the same time. 
You may want to take this into account with your LED decision. If you will not be using the 
TLC5940, you do not have to follow the steps below. 

The TLC5940 circuit can be found here: .. 

It would be best to use a DIP socket in case anything bad happens to the IC, then it can 
easily be replaced. 

One of the "gotcha's" to be careful about with this IC is that the LEDs are not going to 
ground, rather they are going to 5V. It is backwards from how LEDs normally work, 
because these LEDs have to be common anode. 

You can solder the LED wires directly to the board, or use female headers. The chances of 
the LEDs burning out are quite low, provided everything is okay. 

To test the TLC5940 we need to attach an Arduino and run some code. You can find the 
code here: .. 

The LEDs should be changing colours. If they are not, go back and check your circuit. 

© Make Projects 

Page 19 of 28 


Step 17 — Add sensors to RoboBrrd 

The sensors that we will be adding to RoboBrrd will depend on your configuration. Ensure 
that you will have long wires on the sensors to attach into the proto screw shield without 
and pulling. Keep them away from the servos to avoid tangling. 

If we are adding a light dependent resistor (LDR), you may need to attach either a pull-up 
or pull-down resistor. All LDRs vary, so it is best to test this on a breadboard first. 

If we are adding some tilt-ball switches, you will need a pull-up resistor if you are not using 
Arduino's internal resistors. We can find more information about tilt sensors here: 
http://www.ladyada. net/learn/sensors/til. .. 

PIR sensors sometimes need to have their threshold trimpot adjusted. There are also other 
interesting changes you can make to the PIR sensor to make it behave differently, check 
out Ladyada's PIR tutorial: .. 

To test the sensors, run a sketch that prints the sensor's value to the serial port. There are 
some sample sketches that do this in Arduino's examples menu in the IDE. 

© Make Projects 

Page 20 of 28 


Step 18 — Iterative plugging and testing! 

© Make Projects Page 21 of 28 


Just as a friendly cautionary 
warning, this is near the end, and it 
is easy to become excited here 
that the robot will work first try. 
Although this does happen 
sometimes, it is more common for 
there to be glitches and necessary 
fixes. Remain patient with the 
robot, it will work once all the bugs 
are fixed. 

• The first thing to test will be that 
the servos 'jump' when the external 
battery is plugged in. Plug in one 
servo in the direction according to 
how you soldered in your servo 
headers. Be careful not to mix up 
the signal and ground. If the servo 
does jump, it means that it is 
receiving the voltage. If the servo 
does not jump, it is not receiving 
the voltage, so there it probably 
something wrong with the LM317 
circuit. Unplug everything, go back 
and retrace your circuit to find the 

• Choose the 'Sweep' example Servo 
sketch from the Arduino > 
Examples > Servo menu. We need 
to change the pin variable to our 
current servo's pin. Upload the 
code to your Arduino. If the servo 
does not move, check that it is on 
the right pin and the connection 
between the servo and the pin. If it 
still does not work, there is 
probablt something wrong with the 
LM31 7 circuit. Unplug everything, 

© Make Projects 

Page 22 of 28 


go back and retrace your circuit to 
find the bug. 

• Add more servos into the mix until 
you have all servos working. If for 
some reason the servos seem to 
not be as strong as when they were 
originally were at the beginning, it 
may be effecting the output voltage 
of the LM317. Check the voltage 
with a multimeter. You may have to 
adjust the trimpot again to bring it 
close to 5V again. 

• When you are done testing the 
servos, unplug the battery. We will 
need to determine the limits of 
each servo later on, but for now 
they are done. Woohoo! 

• Test the LEDs by using some 
fading PWM code or TLC5940 
code. If they do not work, check 
that they are connected to the 
correct pins. If the TLC5940 still 
does not work, double check the 
circuit to find the bug. 

• We already tested the sensors 
before, but we can check them 
again. Use some Arduino example 
code to print their values out to the 
terminal. If the sensors do not 
work, check that they are on the 
proper pin, given voltage and a 
ground connection. 

© Make Projects Page 23 of 28 


Step 19 — Iterative plugging and testing! continued 

• When all is good, begin the 
boundary tests for the servos. 
Using the 'Sweep' example from 
the Arduino Servo library is a good 
place to start. We need to set the 
upper and lower boundary positions 
for each servo so that they do not 
overwork themselves by trying to 
go someplace where they do not 

• The easiest way to do this is by 
seeing where the servo is at 0, 90, 
and 180 degrees. From here, you 
can gather information about what 
angle the servo is when it is up, 
and when it is down. 

• Take 30 degrees off of each 
boundary to see if it alleviates 
some of the stress on the servo at 
any points. Once the servo is not 
forcing itself (you can tell if it is by 
the noises and heat exhibited by 
the servo), be sure to write down 
the boundaries. These will be 
useful for when we will be making 
behaviours for the RoboBrrd. 
Continue this process for each 

Now that we have the boundaries, 
the LEDs and sensors are working, 
we have a functional RoboBrrd! 

© Make Projects 

Page 24 of 28 


Step 20 — Tidy up & decorate 

We will be heading back to the design of RoboBrrd to tidy it up and also decorate it. For 
decorating my RoboBrrd, I used felt, foam, pipe cleaners, and feathers. Use your 
imagination! What do you want your RoboBrrd to look like? 

The best way to felt the beak is with three pieces. Two of them for the beak triangles, and 
the third one for attaching the beaks together. Adding a tongue is also nice for effect (35). 

If you have a RoboBrrd that has a stand, be careful of the different degrees of freedom 
when decorating. You don't want to prohibit any movement with decorations. 

The wings are triangles on popsicle sticks (36) with added feathers. You can attach the 
popsicle stick directly to the wing's servo arm with glue. 

Using velcro on the top and back panels with felt will provide an easy way to access the 
insides quickly without destroying anything. 

On the back panel, you will want to make sure that you have holes for whatever cables 
you may need to insert. For instance, a hole for the USB cable for the Arduino. 

The rest of it is up to you! Go crazy! 

© Make Projects 

Page 25 of 28 


Step 21 — Code Basic Movements 

■■■■:■(:■ 1.0; 1-^0; *.,) { 


■■-.i-0.-.- 1-»: l^-»; 1~>< 
■without t{l)5 

fcobflflfrdMaifl 1 A tlu 

no M22 


1 R;:sn!irr.::M,nn Mnulh Wings |*J 

, * 



WW BgvtLptoun ((id target. M 0) ( 
.m. turrtrtLb ■ wddWt.EU'XlOp 


urrartl* i- target) ^ 


-) t 







DOn* Saving. , 

Before jumping in to more complex behaviours, we will want to make sure we can make 
the RoboBrrd perform basic movements at first. You can see example code for my 
RoboBrrd on Github . Here is a helpful list to get you started: 

Open beak: Open the beak from a starting position to go to the fully open position. If you 
are up for a challenge, instead of a starting position you could try any from any position. 

Close beak: Close the beak from the open position to the overbite position. 

Left/Right Wing Up/Down: Set the position of the wings to go up and down. 

Turn left/right: If you have a base, turn fully to the left/right. 

Tilt up/down: If you have a base, have RoboBrrd slowly tilt up and down. Tilting is tricky 
because we have to remember that there is a lot of mass above that point of rotation, so 
the speed of the movement can lose control if we go too fast. 

Whatever else you think you will need, this will be a good point to add it here! 

© Make Projects 

Page 26 of 28 


Step 22 — Code behaviours 

• We need to create some behaviours in RoboBrrd's program to showcase the hard work 
that we have done to bring the robot to life! I encourage you to make your own creative 
behaviours for RoboBrrd. Here are some ideas to get you started: 

• Motion detected behaviours: Have RoboBrrd flap its wings and make noise whenever the 
PIR sensor is triggered. 

• Light behaviours: Have RoboBrrd move whenever a certain LDR is triggered. Maybe make 
it play peek-a-boo if both LDRs sense darkness! 

• Chirping behaviours: Have RoboBrrd make different sounds at different moments in time. 
Maybe make it chirp some movie theme tunes! 

• Passive behaviours: Make RoboBrrd do slight movements with its wings and beak. This 
allows others to realize that RoboBrrd is "alive" and they will be able to interact with it. 

• Mesh behaviours: Add an Xbee to RoboBrrd and have it interact with your computer and 
the internet, or other robots! This is a more complex step, but it provides much fun. You 
can see example code for this in depth at 

> Custom behaviours: Think of some new and interesting behaviours and implement them! 
Have fun! 

© Make Projects 

Page 27 of 28 


Step 23 — Share 

• Share what you made! What 
behaviours does your robot 
have? What worked? What didn't 
work? What was challenging? What 
did you learn? We all would love to 
know :) 

Whichever RoboBrrd configuration you built, hopefully you learned more about robotics with it! 
Keep up to date with more RoboBrrd videos on! 

This document was last generated on 2012-10-31 03:03:37 AM. 

© Make Projects 

Page 28 of 28